Go调用C的问题

// hello.c
#include <stdio.h>
void hello(){
    printf("hello\n");
}

将c包装在一个go的包里

//hello.go
package util

/*
#include "hello.c"
 */
import "C"

func Hello(){
    C.hello()
}

go调用

// main.go
package main

import "./util"
func main(){
    util.Hello()
}

调用报错,重复的symbol

duplicate symbol '_hello' in:
    $WORK/b002/_x002.o
    $WORK/b002/_x003.o
ld: 1 duplicate symbol for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决的办法是将c文件中的函数前加 inline或static

// hello.c
#include <stdio.h>
static void hello(){    //加static 或 inline
    printf("hello\n");
}